From what I know, MANPADs are mainly meant for low altitude targets, including copters, and low flying aircraft, but in addition, and this according to Raytheon's specifications for Stinger, cruise missiles. Now I would imagine a successful engagement would occur under certain circumstances, but what these circumstances are I'm not sure. So maybe an AD expert could enlighten us indeed.
In terms of re-designing a MANPAD for targets such as the cruise missile, within in a given envelope of lets say 10 miles and with a speed of Mach 4 - which is possible btw, what would be required ? What kind of guidance ? Even though the visual signature of cruise would be small, what other technologies could be employed to effectively engage it in such an envelope ?
Any thoughts on that ?